<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="goAddpage">添加商品</el-button>
        </el-col>
      </el-row>

      <!-- table表格区域 -->
      <el-table :data="goodslist" border stripe>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="商品价格(元)" prop="goods_price" width="95px"></el-table-column>
        <el-table-column label="商品重量" prop="goods_weight" width="70px"></el-table-column>
        <el-table-column label="创建时间" prop="add_time" width="140px">
          <template slot-scope="scope">{{scope.row.add_time | dateFormat}}</template>
        </el-table-column>
        <el-table-column label="操作" width="130px">
          <template slot-scope="scope">
            <el-button
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="showEditDialog(scope.row.goods_id)"
            ></el-button>
            <el-button
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeById(scope.row.goods_id)"
            ></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 修改商品对话框 -->
      <el-dialog
        title="商品名称"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed"
      >
        <!-- 内容 -->
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px">
          <el-form-item label="商品名称">
            <el-input v-model="editForm.goods_name"></el-input>
          </el-form-item>
          <el-form-item label="商品价格">
            <el-input v-model="editForm.goods_price" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品重量">
            <el-input v-model="editForm.goods_weight" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品数量">
            <el-input v-model="editForm.goods_number" type="number"></el-input>
          </el-form-item>
          <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader
              expand-trigger="hover"
              :options="catelist"
              :props="cateProps"
              v-model="editForm.goods_cat"
            ></el-cascader>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editGoodsInfo">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        background
      ></el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 查询参数对象
      queryInfo: {
        query: "",
        pagenum: 1,
        pagesize: 10,
      },
      // 商品分类列表
      catelist: [],
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      // 商品列表
      goodslist: [],
      // 总数据条数
      total: 0,
      //控制修改商品对话框的显示与隐藏
      editDialogVisible: false,
      // // 修改商品的表单数据对象
      // editForm: {
      //   goods_name: "",
      //   goods_price: 0,
      //   goods_weight: 0,
      //   goods_number: 0,
      //   // 商品所属的分类数组
      //   goods_cat: [],
      //   //图片的数组
      //   pics: [],
      //   //商品详情描述
      //   goods_introduce: "",
      //   attrs: [],
      // },
      //查询到到商品信息对象
      editForm: {},
      //修改表单时的验证规则对象
      editFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
        goods_cat: [
          { required: true, message: "请选择商品分类", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.getGoodsList();
    this.getCateList();
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories");

      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类数据失败！");
      }

      this.catelist = res.data;
      console.log(this.catelist);
    },
    // 根据分页获取对应的商品列表
    async getGoodsList() {
      const { data: res } = await this.$http.get("goods", {
        params: this.queryInfo,
      });

      if (res.meta.status !== 200) {
        return this.$message.error("获取商品列表失败！");
      }

      this.$message.success("获取商品列表成功！");
      console.log(res.data);
      this.goodslist = res.data.goods;
      this.total = res.data.total;
    },
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getGoodsList();
    },
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage;
      this.getGoodsList();
    },
    //展示编辑商品的对话框
    async showEditDialog(id) {
      //console.log(id);
      const { data: res } = await this.$http.get("goods/" + id);

      if (res.meta.status !== 200) {
        return this.$message.error("查询商品信息失败！");
      }

      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //监听修改商品对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    //修改商品信息并提交
    editGoodsInfo() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;
        //发起修改商品信息并提交
        const { data: res } = await this.$http.put(
          "goods/" + this.editForm.goods_id,
          {
            goods_name: this.editForm.goods_name,
            goods_price: this.editForm.goods_price,
            goods_weight: this.editForm.goods_weight,
            goods_number: this.editForm.goods_number,
            goods_cat: this.editForm.goods_cat,
          }
        );

        if (res.meta.status !== 200) {
          return this.$message.error("更新商品信息失败！");
        }

        //关闭对话框
        this.editDialogVisible = false;
        //刷新数据列表
        this.getGoodsList();
        //提示修改成功
        this.$message.success("更新商品信息成功！");
      });
    },
    async removeById(id) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该商品, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);

      if (confirmResult !== "confirm") {
        return this.$message.info("已经取消删除！");
      }

      const { data: res } = await this.$http.delete(`goods/${id}`);

      if (res.meta.status !== 200) {
        return this.$message.error("删除失败！");
      }

      this.$message.success("删除成功！");
      this.getGoodsList();
    },
    goAddpage() {
      this.$router.push("/goods/add");
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>

<style lang="less" scoped>
</style>
